Add option to hide players on map that have invisibility potion effects

src/main/java/org/dynmap/bukkit/DynmapPlugin.java

@@ -63,6 +63,7 @@ import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.PluginDescriptionFile;
 import org.bukkit.plugin.PluginManager;
 import org.bukkit.plugin.java.JavaPlugin;
+import org.bukkit.potion.PotionEffectType;
 import org.dynmap.DynmapAPI;
 import org.dynmap.DynmapChunk;
 import org.dynmap.DynmapCore;
@@ -608,6 +609,13 @@ public class DynmapPlugin extends JavaPlugin implements DynmapAPI {
         public long getFirstLoginTime() {
             return offplayer.getFirstPlayed();
         }
+        @Override
+        public boolean isInvisible() {
+            if(player != null) {
+                return player.hasPotionEffect(PotionEffectType.INVISIBILITY);
+            }
+            return false;
+        }
     }
     /* Handler for generic console command sender */
     public class BukkitCommandSender implements DynmapCommandSender {

src/main/resources/configuration.txt

@@ -42,6 +42,8 @@ components:
     hideifsneaking: false
     # If true, player positions/status is protected (login with ID with dynmap.playermarkers.seeall permission required for info other than self)
     protected-player-info: false
+    @ If true, hide players with invisibility potion effects active
+    hide-if-invisiblity-potion: true
   #- class: org.dynmap.JsonFileClientUpdateComponent
   #  writeinterval: 1
   #  sendhealth: true
@@ -62,6 +64,7 @@ components:
   #  webchat-permissions: false
   #  # Limit length of single chat messages
   #  chatlengthlimit: 256
+  #  hide-if-invisiblity-potion: true
    
   - class: org.dynmap.SimpleWebChatComponent
     allowchat: true